with price of btmx going up, ROI for stacking goes down, and vice versa...its still good ROI at this level, imagine, neo, ont, tezos, eth etc...are still in single digit ROI for stacking, even 7% seems good ROI, here its 20%

Its a good indication as price of BTMX rises and ROI goes downward and also stacking is 20% which is nice.
Yes, it is. I didn't said otherwise. I know that when the price is going up, the ROI is going down only if the reward is fixed, but in the case of BTMX I know is volume/profit related. That was my question.